Paper-gripping device for plate printers



April 3, 1928. 1,664,700

c. F. NAYER PAPER GRIPPING DEVICE FOR PLATE PRINTERS Filed April e. 1927 sheets-snm 1 Patented Apr. 3, 1928.

rn iin-1F.:

CARL fr. Namen, .or marcando.` yfiLmNoIs, AssrGNon-grol llismrroir .MACHINE 00...@

Y eonronamrolvfor immers. i

application mea yApril e, 11927. seriaiivo. 181.292.

This invention relatestofaprinting Ina- ,cliine and concerns itselfy Vprimarily with gripping Aand lregistering means lfor :the sheets ot'kgpaper to feed" the same betweenithe printingroll and thel'oedplate.'v Y

Theinvention comprises'the novel `struc- ,tureand combination of parts 'hereinafter described and morelparticul'arlypointed out anddefi'ned inithe appended claims.

In 'the' accompanying drawings' which illustrate .a `lpreferreil i embodiment of this inve'ntio'ny andin which similar reference n.11- merels referto similar features iirthe Vdifferent-views:

Onfthe dra'vvings': Y Figure -l -ris aV fragmentary plan 'vievvfof a printing machine involvingthis invention.

.'Eigure22 'is a vertical flongitudinal View throughthe printing rll'and bedfplate. 20

end elevational View. of the printing roll and'v a portion of the kprinting plate .or'bed plate'that cooperates with said nroll. The other parts of the machine are 36 not illustrated as they are unnecessary tor .thet urpose of explaining thisinvention.

rThe printing roll I which iscovered `With .usual fabric coating or thelike `isqsecured upon a shaftl2 -Which isfjournaled-atits ends in suitablebearings. This roll isprovided` with Aa "longitudinal 'trapezoidal groove 4. A flat metal strip 5 is hinged in saidhgroove -uf on asuitablerod supportedbytheends or the roll. The free margin of the plate 5 .carriesa plurality of yielding grippers 7 ,whichare inthe'forin oflugs or lingers and a plurality oi' stop lugsf8 are 'formed' onthe plate a short distance rearwardly Y of the grippingiingers. The hingediplate' is connected ito aplunger-9 i by means of aJbracket 10. "Thevplunger 9-eXtends through a suitl.ableaperture in the'bodyio the'roll and into A s. suitable socketfinthe shaft 2 as shown in Figure' 3 isan enlarged' transverse vertical Figures 2 and 3. 'Therollvshaftis'provided with a central bore in-vthichfa rodlllis slid- :ably mounted. The rod llisiprovidedfvvith ianotclr 12 which terminatesl atitsrear end ushaped endd -14 Awhich is Anorm-ally ,proj eeted in the notch f12L'oflthe-rod 111. AA coil-spring lo-isipos'itioned between .the -refarA end of the drod"flland"the end o'fithebore in^the=shafti2 for yieldingly projecting fthe A`rod Il in an `outward direction. .Normallythe springel will proj ect'therod" -ll inanoutvvard direc- *tion and depress the plunger 9 against the i `tension oi? its 4spring 16 which surroundsfthe .plunger-'between the shoulder formed iby -its rupper enlarged1 head and" anannullar shoul- EderY formedhythe Washerfl Which is Ase e cured-tothe bottom ofthe-.groove whereby the spring is confined tor normally Jproj eeting the' plunger 9 'in' an upward direction.

Thefrod bprojectsfbeyond the-endy ofthe shaft 21orfengagenient by a lever 18 -vvliich e -is pivotedintermediate itsendsupona llug i19l secured'to the end-bearing vfor-the shaft.

IThe ,l'ovverffend `of the *lever 418 is provided With-anadj ustablefcontact'meinheriQO which Vis` adapted 4to Che engaged by `a sliding rod '21 zin" the stationary base 22 yfor the slidalole `printingplate A guideway'24; is formed uponthestationarybase22. A slide 25 is :mountedinthisguidevvay.` 011e end ofthe slide abutstlre rod--2l xWhile the otherend of 'the `slide carries `a transversely extend- -ingcam member-26 the-ends o'f Whiclrare vbeveled*as:indicated at` 27. V

'The `printing lplate v23 is "adapted to be actuated by `a chain member28 Whichhas a special linkl 29 provided With a cam portion '30 twhich 'isfadapted toren'gaging the `cana vnieinloer 26`for 4projecting the rod 21V lfor -actuating the lever 18. 'The chainY travelsiin va suitable space in thebase'22and` is adapted :.tobe attached'to'theprinting platefby means oflbolts 3l 'as shown in Figure. It-inight `he mentioned that in 4the present machine.

respectto the roll, coop'ergtingingers 32 ioo under'thefguidaiice'o-a feed V*table --lltV the roll should not form a proper contact in A relationto the printing plate, the same may be adjusted by meansof the'end bearings 3f aforementioned which arey slidablyl mounted A in Vsuitable boxes provided therefor 4'and well lmwliirlthe'ert.; 4

is; .travels'in a rectangular or oblong path and of course, bei.,understood thatA the' chainM 28V carries 1 the printing plate, 'V23 therewith.

`Normally the spring 15 will project ythe rod 1l `bey )nd theendjof the plunger Qifpor depressing` thed 4hinged plate 5 wherebygit is ypossiblefor the operator to yslip a sheet down- ,gwarjdly upon the feed table Se into lproper y position.' Consequently, the' spring l gripping lingers'' Aare normally 'heldin an 1n operative.position. `When the cainvlinkiSO v 3o1nes in position, to engage Vthefslide 25, .the shaft v21 will be I projected:goutwardlys iand the vrodlllwilly be Aprojected inwardly against the tension :of the springs to bring the notch 12 opposite the4 end of they plunger 9 whereupon'the spring l16 will elevate the plunger 'and at the saine time Atheuhinged plate 5 to bringthe Igripping fingersinto contact with Vthe paper' :tor grippingv the saine against the roll. These lingers will remain .gripping relation with the i paper asl long as the cam linkSOvridesnponuthe cam vmember 26,. .j When the. cam y linl; ,30

K rides off the cam,member,2'6-thespringflV will project the rod lllloutwardlyanddepress the plunger 9 tlirblisll theeacten 0f fthe @am Surfaces l? M1414- At hemmen time' the rod 2l` willfbe shifted inwardly.

v `through the .actuationyof the lever in N order to bringthe .cainmember 26",-in the. rpath @fthe @am link 3.0- Y WheIl the insre." or lugs 33 on the printing plate 23j` engage i y lthe ngers 32 on the roll, the roll will be actuated Vbythe bed` plate.. The roller will be consequentlyrotatedand as soon vas kthe sheets, are compressedbetween the roll and. the printing plate the cam link .30 will ride 0H theI cam `member 26Y *allowing` the, spring Y 15 to project the rod 11. outwardlyrfor depressing Vthe plunger 9 through the coaction of ythe cam surfaces 13 and 14 whereby the l hingedl plate 5 is depressed and the ngers i Y 7 are movedfout of gripping relation with the: sheets. This operation will orV course `be repeated'through each'cycleof operation of the printing plate.

"'From` the foregoing, it, will be appresi'` ated that I have providednoveland posi- 5 ftively.V actuated mechanism `for controlling 6 j the gripping'lingersV for theY` sheets" in a '51, 'a printing machine,

i :11i the operation@ semaineicnifihg-plae movable .wiihiespeci ibisaidfifll,

means on said Arollfior gripping*` aj she Y tov f said f hinged'ffpflate,

printing machine whereby the ngersar'e made and numerousY details of construction may be varied through a wide range without departing from the", principles of this invention and I,-`tlier'eore, do not pur ose limiting. thepatent granted hereon, ot er- 4wise than necessitated by the f which may baadiusd, `by ,a .Safer .Baas-1S prior art.

A I claimjas my.l invention: rV4 afrol-1.a

means Yfor actuating said printingpl t paper, a,v yieldingly actuated plunger? slid-I' ably supportedin said rollfand connected.

to said gripping means, al rod in 'saidf 'roll A'for' coaction'with said plunger, spring ifor proj ecting said irod in' onenir'ectioii "for de-"j i pressing said plunger, and meansa'ctuated" by the drivingmeans'of tlie'fprinting plate -fofaftlltllg said rod for` releasing'said plunger. f,

'- 2. In a printing machine, a relljliavi'ng:a,l

longitudinal groove, f al v`hin-ged member 'mounted said groove, said 'hingedinember having gripping fingers, 'a springgactuated plunger slidably' mounted `in "said roll and y connected to said" hinged `member,

printing plate movable with respect: tojsaid roll, driving means for saidpiintingI plate, and means responsive to V'said driving'means for controlling said springpressedY plunger for the' purpose set forth. Y

3. In: a printing machine,4 a-roll having longitudinal grove, aV hinged member hav- ,ingwgripping fingers supported infs'aid groove, la spring" pressed plun'gerfslidably mounted iii saidroll and connectedto said j with l.respectto said roll, a chainor, aotulatingrsaid printinglfplatenand mechanism, i'or controlling said "spring pressed plunger actuated bysaid` chain. Y

l" In a plate printing machine, a" ,rollin having a groove, a hinged Vmember having gripping imgers 'mounted in (said groove,

easpring pressed plunger slida'bly 'mounted in said roll 'and `connected to said, hinged. member, a longitudinal'rod slidably mount! ed` in said roll for cooperating with, said ried' bys'aid roll, a spring pressed 'plunger slidably mounted in said rollfand connected l i Y Y vrarod""slidaloly mounted in said rollA and having ar 6am hinged member', a printing Jplate"movableX 125 a hinged plate having` gripping fingersfcarf,

notch adjacent the end of said plunger, shifting said rod to bring said cam notch a spring for projecting said rod for deinto registry with the end of said plunger. pressing the plunger, a lever pivoted in- In testimony whereof I have hereunto l0 telmediate its ends for engaging said subscribed my name at Chicago, Cook 5 rod, and a movable printing plate, and County, Illinois.

means actuated by the movement of said printing plate for actuating said lever for y CARL F. NAYER 

